
doi: 10.5644/sjm.06.2.08
In the Euclidean plane Griffiths's and Thébault's pencil of the circles are generally different. In this paper it is shown that in an isotropic plane the pencils of circles, corresponding to the Griffiths's and Thébault's pencil of circles in the Euclidean plane, coincide. 2000 Mathematics Subject Classification. 51N25
Analytic geometry with other transformation groups, isotropic plane; Thebault's pencil of circles, pencil of circles, Thebault's pencil of circles, isotropic plane
Analytic geometry with other transformation groups, isotropic plane; Thebault's pencil of circles, pencil of circles, Thebault's pencil of circles, isotropic plane
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